Mitsubishi Electric MSZ-GA50VA Service Manual page 17

Lighted
Blinking
Not Lighted
Abnormal
No. Operation indicator lamp
point
Right lamp flash
MXZ type
Operation
1
mode
2.5-second OFF
setting
NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first
detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with
OPERATION INDICATOR lamp flashing.
9-5. Trouble criterion of main parts
MSZ-GA50VA -
E1
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))
Indoor fan motor(MF)
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
· Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates
abnormality.
· OPERATION INDICATOR lamp (left-hand side lamp) is lighted.
Symptom
Outdoor unit
operates but
indoor unit
does not
operate.
MSZ-GA60VA -
E1
Check method and criterion
Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)
Normal
8 k" ~ 20 k"
Check 9-6. A.
Measure the resistance between the terminals with a tester.
(Part temperature 20°C ~ 30°C)
Color of the lead wire Normal
BRN-other one 240 " ~ 260 "
Detection method
When the operation mode of each indoor unit
is differently set to COOL(includes DRY) and
HEAT at the same time, the operation mode of
indoor unit that has operated at first has the
priority.
MSZ-GA71VA -
E1
Abnormal
Open or short-circuit
Abnormal
Open or short-circuit
17
Check point
• Unify the operation mode.
Refer to service manual
OB377.
Figure
RED
ROTOR
YLW
BRN
ORN GRN